Having grown up in the bush, and spent time at the saw bench professionally, I find that saw cleanliness can usually tell you exactly who is using it. Average Joe homeowner backyard warrior will either have a spotless clean saw that wont run because it had bad gas in it, or it will be a dirty mess because "I didn't know I had to clean that," and the chain is usually a disaster.
Your average firewood burning guy will know to keep the air filter and under the cover clean, maybe knows to pull the bar and chain and clean everything, maybe doesn't. Saws are usually in decent shape, decals all there, not all scratched up, etc. Chains are usually decent, either machine sharpened at the saw shop, or usually half decently hand filed.
Typical production user(never dealt with big wood fallers, always pulp/studwood production) who has the dealer work on his stuff, either a disaster because they just don't deal with it, or clean, but didn't care if they scratched it up cleaning it. Chains, either machine sharpened or very well done by hand.
My dad for example, his saws would stay in the bush for months at a time, and the screwdriver end of the scrench was as good a cleaning tool as any. He seldom kept a saw past a full year until after he had a tree fall on him and he slowed down.
Keep it clean? Yes.
Change the air filter for the clean spare once a day? Yes.
New spark plug once a month and a spare in the lunch box? Yes
New fuel filter once a month, and a new one in the lunch box? Yes
Fix it if it dies in the bush? No, grab the spare and trade in the dead one on Saturday.
We are talking 40-50 hours of runtime per week here producing 8 foot pulpwood, and keeping the saw pretty was not as important as keeping it reliable.
Thats the last three saws Dad bought new, 242xpg, 246xpg, and his 254xp, none are pretty, plastics are scratched up, some from use, lots from cleaning with not necessarily the right tool, but they all run damn good.
The guys who keep their stuff clean and shiny and wax their plastics, well, I tended to see those guys coming to buy parts, not bringing their saws to be worked on, definitely more typical of the enthusiast that has saws because they like saws(which is squarely where I fall into this,) and not the guys that use saws to put bread on the table.
Personally, the majority of my saws saw pro use previously to living on my shop shelves, and no amount of polish is going to make them shine like new, but the nice ones like my 262, they get the treatment.